ASUS ROG Astral GeForce RTX 5080 OC Edition: features, specs and who it suits

The ASUS ROG Astral GeForce RTX 5080 OC Edition is a high-end graphics card with 16GB of GDDR7 memory and a large cooler with four fans. ASUS calls it ROG's first quad-fan graphics card. Here is what the main specifications mean for a gaming PC.

The GPU and memory

The card is built on NVIDIA's Blackwell architecture and supports DLSS 4, NVIDIA's upscaling and frame-generation technology, which in supported games can raise frame rates by rendering fewer pixels and reconstructing the rest. It has 16GB of GDDR7 memory, the newer generation of graphics memory. A card of this class is typically aimed at high-resolution and high-refresh-rate gaming, and at creative work that benefits from GPU acceleration.

"OC Edition" means ASUS ships it with higher default clock speeds than NVIDIA's reference design; the listing describes "towering default clock speeds" and boosted power delivery. Actual gains vary by game and by how well the card is cooled.

Four fans and the cooling design

The cooler is the headline. ASUS lists:

• Four Axial-tech fans, which ASUS says boost airflow and pressure by up to 20%.
• A patented vapor chamber with a milled heatspreader, designed to move heat from the GPU across the heatsink for lower temperatures.
• A phase-change GPU thermal pad, which ASUS says ensures optimal heat transfer between the chip and the cooler.
• Increased heatsink fin density, with the fin array tuned for the airflow of all four fans.

In general, a larger and more capable cooler lets a card hold its boost clocks for longer and run quieter, though the result depends on the case and its airflow.

Size: a 3.8-slot card

The card takes up 3.8 slots in a case and measures about 14.1 x 5.9 x 3.0 inches (36 x 15 x 7.6 cm). It weighs 5.0 lb (about 2.3 kg). That is a big, heavy card: it needs a roomy case, enough clearance beside it for airflow, and often a support bracket or other measures to avoid sag, as ASUS's instructions describe.

Connections and interface

The card uses a PCIe 5.0 interface and offers HDMI and DisplayPort 2.1 outputs. It will also work in slots of older PCIe generations, typically with little loss in most games. A die-cast frame and a metal GPU bracket add rigidity.

Power

The listing doesn't give power figures. High-end cards draw a lot of power, so check the manufacturer's page for the recommended power supply wattage and the power connector the card uses, and confirm your supply provides it.

Who it suits

It suits enthusiasts building or upgrading a gaming PC for high resolutions and high settings, who also want a premium, well-cooled design and have a large case. It is more card than most casual players or office users need.

What to check before you buy

• Case fit: measure the length, height and the 3.8-slot thickness against your case, and check that the neighbouring slots are free.
• Power supply: confirm the recommended wattage and the power connector type for this card.
• Motherboard slot: check that you have a free PCIe x16 slot with enough space.
• Weight support: read the instructions on supporting the card to prevent sag.
• Monitor: confirm your display can take advantage of the card's outputs and resolution.
• Airflow: a card with this much cooling still needs good case airflow.

The short version

• A graphics card based on NVIDIA Blackwell with DLSS 4 and 16GB of GDDR7.
• OC Edition with higher default clock speeds.
• Four Axial-tech fans, a vapor chamber and a phase-change thermal pad.
• A 3.8-slot design with a die-cast frame and a metal GPU bracket.
• PCIe 5.0, with HDMI and DisplayPort 2.1 outputs.

Bloiq is reader-supported. Some links may earn us a commission; it never affects what we write. How we make money.